Dair is a temple and haram is a mosque. Dairo-haram means places of worship. The couplet (part of the famous Jagjit ghazal) goes like this:

Dair-o-haram mein basane waalon
Maikhvaaron mein phoot na dalon

Maikhvaar means a drinker. Urdu poets have a long tradition of associating maikhana with pleasure-seeking life without the hassles of religion, saaki with God or lover.
So the couplet basically means that men of God shouldn't bring their religious issues in our pleasure-seeking, secular life. Contrary to what GpeL pointed out, dair has got nothing to do with dairaa (AFAIK).